Without a Net

Before we go on to explore below our twenty most popular websites; their uniqueness and exigencies, let's remember those websites once wildly popular that have fallen by the wayside* (or are still so and I didn't fact check. Sorry CNET)

About

Altavista
Amer. Greetings
Angelfire
Ask Jeeves
AT&T
Classmates
CMU.edu
CNET
Comcast
Compuserve
craigslist
Demand Media
eUniverse
Excite
Gator
Geocities
Glam Media
GNN
Go
Go2Net
Goto
Grab
Infoseek
Juno
LookSmart
Lycos
Netscape
Primenet
Prodigy
Real
Symantec
UIUC.edu
Umich.edu
Uproar
Vendare
Verizon
Viacom
Vivendi
Well
Xoom

*either swept aside by stronger competitors, absorbed, still going but with a greatly reduced audience, or nothing but a landing page. So it goes.
It was too much work to check each and every one of them, a few have popped up in previous posts and I've assumed that the likes of Disney and NBC are still doing alright. We know Walmart are.